INSTALLATION & OPERATION MANUAL MODEL IT375 FIELD MOUNTED RATE INDICATOR AND TOTALIZER

Transcription

1 INSTALLATION & OPERATION MANUAL MODEL IT375 FIELD MOUNTED RATE INDICATOR AND TOTALIZER February 2002

2 Sponsler, Inc. Model IT375 Contents Pg. 2 CONTENTS 1. Introduction Model Number Designation Intrinsic Safety Considerations 4,5 2. Specification 6 3. Operation Display Test Mode Filtering Calculation of Rate and Total Total Conversion Frequency Cutoff Linearizer Programming Program Steps 12, Flow Chart 14,15 5. Example Versions Battery Powered Version DC Power Version Relay and 4-20mA Output Version Flowmeter Input 20,21,22 8. Intrinsic Safety Connections Coils Simple Apparatus Namur Proximity Switches 23, Alarm Outputs Installation Wall Mounting Panel Mount Version Removing the Front Panel The Main Electronics Wiring Terminal Designations 28 Index 29

3 Sponsler, Inc. Model IT375 Introduction Pg INTRODUCTION The Model IT375 Rate Totalizer is a microprocessor-based instrument that accepts a sinewave or pulse input from Sponsler Company, Inc. Precision Turbine Flowmeters. The instrument displays 5 digits of Flowrate, 7 digits of Resettable Total and an Accumulated Total. The displayed rate and total values can be in different engineering units. The instrument is compatible with a wide range of flowmeters. Links on the input board enable the circuit to be configured for millivolt signals, reed switches, pulse trains and most other signal types. Although three different versions of the Model IT375 are available, No.3 is the standard. 1. A Battery Powered Version with no outputs. 2. A DC Powered Version with either: i. high and low flow alarms or ii. a low flow alarm and pulse output. 3. A Loop Powered Version with 4-20mA output and alarms as above. The instrument is fully programmable from the front panel; the user can program timebase, K-factors, alarm and 4-20mA setpoints, decimal placements and filter constants. The Model IT375 features many improvements, a few are listed below: The output board can have both ALARMS and a 4-20mA OUTPUT. The voltage drop across the alarm outputs is only 0.8 VOLTS. The voltage supply for the DC and loop powered versions can go AS LOW AS 9 VOLTS. Overall lower current consumption with an improved battery life - 5 YEARS BATTERY LIFE is typical regardless of the duration of totalizing activity 4-20mA output ACCURACY is 0.05% of span and the LINEARITY is 0.05% of span at 25 C. The millivolt input can accept signals AS LOW AS 15mVp-p. Wide input frequency range Hz to 10kHz. Wide Kfactor range - Kfactors from to 999,999 can be programmed. Available in a PANEL MOUNT version. The Model IT375 Rate Indicator and Totalizer conforms to the EMC-Directive of the Council of European Communities 89/336/EEC and the following standards: Generic Emission Standard EN Generic Emission Standard EN Generic Immunity Standard EN Generic Immunity Standard EN Residential, Commercial & Light Industry Environment. Industrial Environment. Residential, Commercial & Light Industry Environment. Industrial Environment. In order to comply with these standards, the wiring instructions in Section 9.5 must be adhered to.

4 Sponsler, Inc. Model IT375 Introduction Pg MODEL NUMBER DESIGNATION The Model Number of the IT375 describes the power & output options installed and the mounting options. Intrinsically Safe Model IT375i. 4 0 L Mounting Options: SR = Strain relief cable entry PM = Panel Mount WM = Wall mount 4 = Turbine Adaptor(standard) XP = Explosion proof Linearized Versions: 0 = Battery Powered Version 3 = DC powered with battery backup and alarm outputs 4 = Loop powered with 4-20mA output, alarm outputs and back up batteries The above sample part number is the standard IT375 unit. 1.2 INTRINSIC SAFETY CONSIDERATIONS The Model IT375i is certified for use in hazardous areas and has both CENELEC and CSA NRTL/C approvals. The Model IT375i certification details are: CENELEC Approval: Type of Protection: Group: Temperature Class: Kema. Ex ia. IIB. T4 at ambient temperature of 60 C. CSA NRTL/C Approval File Number: LR Type: Class 1, Groups C and D. When installing in hazardous areas, the instrument must be installed according to the guidelines in Section 8 and in accordance with standards for wiring and installation in hazardous areas. 4-20mA/DC Power: The input can be connected to IS circuits with the following maximum values: Ui = 28V Ii = 93mA Pi = 653mW The internal capacitance and inductance seen on these terminals is 0.1uF and 0mH. Relay Outputs: The outputs can be connected to IS circuits with the following maximum values: Ui = 28V Ii = 93mA Pi = 653mW The internal capacitance and inductance seen on these terminals is 0.1uF and 0mH.

5 Sponsler, Inc. Model IT375 Introduction Pg. 5 Flowmeter Input: Entity parameters on the flowmeter enable connection to a wide range of approved sensors. Input parameters are: Ui = 24V Ii = 20mA Pi = 320mW The internal capacitance and inductance seen on these terminals is 0.002uF and 0mH. Output parameters are: Uo = 10.0V Io = 9.0mA Maximum allowed external capacitance is 60µF. Maximum allowed external inductance is 1.5H.

6 Sponsler, Inc. Model IT375 Specifications Pg SPECIFICATION General: Display: LCD which is continuously powered. Resettable Total: 7 digits with 10mm (0.4") high digits. Resettable from front panel. Accumulated Total: Displayed when the ACCUM TOTAL button is depressed. Rate: 5 digits with 8.5mm (0.33") high digits. K-factor: The pulses per unit of measure (eg. pulses/gallon) is programmable in the range to 999,999. Decimal Points: Decimal point positions are fully programmable for both rate and total. Timebase: Rate can be displayed in units per second, minute, hour or day. Frequency Range: 0.01Hz to 10kHz. Signal Type: Link settable for sinewave (15mV P-P minimum), open collector, reed switch, pulse or Namur proximity switch. Battery Powered Version: Type: Battery Life: Two lithium battery packs. 5 years typical. Loop Powered 4-20mA Output Version: Scale: The 4mA and 20mA points are programmable. Resolution and Linearity: 0.05% of span. Accuracy: 0.05% of span at 25 C. 0.1% (typ) of span, full temperature range. Update Time: 0.5 second. Connection: Two-wire. Loop Power Supply: 9-28 Volts. Supply Backup: Lithium battery DC Power/Alarm Version: Outputs: Saturation: Switching Power: DC Power Input: Supply Backup: Output Pulse Frequency: Output Pulse Duration: Physical: Temperature: Dimensions: Protection: Cable Entry: Turbine Meter Adaptor: Optional Mounting: Wall: Pipe: Panel: Cutout: Two optically isolated open collector outputs suitable for driving DC solenoids or external relays. The outputs can be programmed to provide high and low flow alarms or pulse output and low flow alarm..8volts 200mA. 30VDC maximum Volt at 4mA maximum. Lithium battery. 500Hz Maximum 1ms if CAL0 = 2 (unscaled pulse output). If CAL0 = 1 (scaled pulse output) the duration of the pulse automatically adjusts to the output frequency: a. 1ms if output > 50Hz. b. 10ms if output = Hz. c. 100ms if output < 5Hz. Operating temperature: -20 C to 60 C. 97mm (3.8") high x 150mm (5.9") wide x 41mm (1.6") deep (cable glands not included). Sealed to Nema 4X or IP67 standards. By cable glands. An optional mounting stem is available for mounting the Model IT375 directly on turbine flowmeters which have a 1" NPT boss or 1" BSP boss. Universal mounting bracket supplied as standard. A galvanized metal bracket is available which enables the Model IT375 to be attached to a 2" vertical or horizontal pipe. Supplied with mounting brackets. Terminals accessible from rear. The panel mount version is not watertight. 141mm (5.6") wide x 87mm (3.4" high).

7 Sponsler, Inc. Model IT375 Operation Pg OPERATION The Model IT375 Rate Indicator and Totalizer accepts a sinewave or pulse input from a wide range of flowmeters. The instrument is fully programmable with all operating parameters and calculation constants programmable from the front panel. The setup parameters are stored in a non-volatile memory and are retained for at least 40 years in the event of a power loss. 3.1 DISPLAY The Model IT375 displays: Rate Resettable Total Accumulated Total Both the Rate and Resettable Total are displayed continuously. The Accumulated Total is displayed only when the ACCUM TOTAL key is depressed. The keys on the front of the IT375 have the following functions: ACCUM TOTAL Depressing this key will display the Accumulated Total. RESET Depressing this key resets the Resettable Total at any time. Depressing this key advances the Program Mode scroll 3.2 TEST MODE The IT375 has a Test Mode which can be entered by simultaneously depressing all 3 front panel keys. The tests and results are as follows: Low Test High Test Display Test Depressing the ACCUM TOTAL key, the low alarm output (if installed) will go low. If a 4-20mA option is installed, the output will go to 4mA. Depressing the RESET key, and depending on the programmed pulse output mode, the high alarm output (if installed): a. will go low if CAL0 = 0 (low and high alarms) b. will output 100ms pulses every 0.5 sec if CAL0 = 1 (scaled pulse output). c. will output 1ms pulses every 0.5 sec if CAL0 = 2 (unscaled pulse output). If a 4-20mA option is installed, the output will go to 20mA. Depressing the key, all segments of the display will flash. To exit the Test Mode, simultaneously depress all three front panel keys.

8 Sponsler, Inc. Model IT375 Operation Pg FILTERING Frequency fluctuations caused by pulsating flow through a flowmeter can interfere with the precision of the displayed rate. For this reason, the Model IT375 has a programmable digital filter which will average out these fluctuations and enable accurate, stable readings. The degree of filtering of the input signal can be adjusted depending on the magnitude of fluctuation and the particular application. Values from 1 to 99 can be programmed where 1 corresponds to no filtering and 99 corresponds to heavy filtering. Such flexibility in filtering allows each application to be addressed on it s merits. When programming the degree of filtering, it is advisable to start with no filtering (the factor equals 1) and gradually increase until a steady reading is obtained. It is important that the filtering is not too heavy because this will cause an overdamped (slow) response to changes in the flowrate. The following graph shows the time to reach 90% and 99% of a new reading for a step change in input signal. 120 Filter Factor vs Time to Reach New Reading (for a step change in input signal) Time to Reach % of New Reading (seconds) Filter Factor 90% of New Reading 99% of New Reading

9 Sponsler, Inc. Model IT375 Operation Pg CALCULATION OF RATE The flow rate, R, is calculated as follows: R= f x H K where f is the input frequency in Hz (pulses/second). H is the timebase of rate and is 1 for seconds, 60 for minutes, 3600 for hours and 86,400 for days. K is the Kfactor (pulses/unit volume). The Kfactor is flowmeter dependent and is supplied with the flowmeter. It will be either on a calibration certificate or stamped on the body of the meter. The user programs the Kfactor and selects the timebase during the programming procedure. 3.5 TOTAL CONVERSION The Total Conversion Factor is programmed to enable the rate to be displayed in one engineering unit and the totals to be displayed in another. For example, the rate can be displayed in gallons/minute and the totals in barrels. The Total Conversion Factor is a division factor which is used to convert the totals to a different engineering unit than the rate unit. Therefore, it only affects the totals (both resettable and accumulated). Example: If the Rate is required in gallons/minute: 1. The Kfactor would be programmed as pulses per gallon. 2. The Timebase would be programmed as minutes. If the Totals are required in barrels: 1. The Total Conversion Factor is programmed as 42 because there are 42 gallons in a barrel. All totals will now totalize in barrels. Below is a table containing common units and their corresponding Total Conversion constants: Rate/Unit Time Totals Total Conversion Factor Gallons (US)/Unit Time Barrels (oil) Litres/Unit Time Kilolitres 1000 Litres/Unit Time m ml/unit Time Litres 1000 Mgallons/Unit Time Acre-feet Equivalency 1 rate unit equivalency Equivalency 1 rate unit reciprocal of equivalency (1/equivalency)

10 Sponsler, Inc. Model IT375 Operation Pg FREQUENCY CUTOFF A frequency cutoff can be programmed below which flow rate is not registered. Input frequencies at or below the cutoff are totalized, however, the rate is displayed as zero. The frequency cutoff has a default value of 0.25Hz. The cutoff should be left as 0.25Hz unless the flowmeter in use has a lower frequency. Note that the lower a cutoff frequency the correspondingly longer response time for flow rate to update. For example, if the cutoff is set to 0.01Hz the Model IT375 will continue to display the flow rate for 100 seconds even if the signal stops. This is because a cutoff frequency of 0.01Hz means that the time interval between signals is 100 seconds (period = 1/frequency), therefore, the Model IT375 must wait 100 seconds before it can determine that the flow has actually stopped. 3.7 LINEARIZATION The following diagram graphs the change in K-factor with frequency for a hypothetical flowmeter. The heavy black line represents the actual K-factor of the flowmeter, while the light black line is the approximation used in the instrument. Scaling Factor Out 2 Out 1 Out 3 Out 5 Out 4 Frequency 0 Inp 1 Inp 2 Inp 3 Inp 4 Inp 5 Up to 10 frequencies and K-factors can be programmed. Frequencies must be programmed in ascending order. Linear Interpolation is used between points. If an input frequency is less than the first (lowest) or greater than the last (highest) programmed frequency, the K-factor will remain a constant value. Note: Display update time increases to 1sec if the linearizer is enabled in the battery powered version of the Model IT375.

11 Sponsler, Inc. Model IT375 Programming Pg MING The Model IT375 is fully programmable with all parameters being stored in non-volatile memory. The Program Mode can be entered in one of two ways: 1. By removing the lower cover strip (ie. the dark grey strip along the bottom of the enclosure) and reversing it s left right orientation. This brings a small magnet on the inside of the cover strip in contact with a reed switch inside the instrument. 2. By removing the front section of the enclosure which contains the main processor board and batteries. The key is used to step through the program (CAL sequences) and the ACCUM TOTAL and RESET keys on the front panel are used to change and increment the flashing digits. Note that only flashing digits can be changed. Up to eighteen CAL steps are accessible depending on which options are installed. The CAL number is displayed in the lower right display and the parameter is displayed above it. Parameters in Program Mode that consist of whole numbers and digits after the decimal point are restricted to a maximum of 6 digits combined. Therefore, the number of significant digits entered as whole numbers will determine the number of available digits after the decimal point. Example: The entry of 1, 100 and 10, in the whole numbers leaves 5 digits available after the decimal point in the whole numbers leaves 3 digits available after the decimal point in the whole numbers leaves 1 digit available after the decimal point

12 Sponsler, Inc. Model IT375 Programming Pg STEPS Step CAL 00 Comment Pulse Output (applies to DC Power/Alarm version only). 0 = No pulse output, low and high alarms. 1 = Scaled pulse output and low alarm. 2 = Unscaled pulse output and low alarm. CAL 01 CAL 02 Kfactor - whole numbers. Kfactor - digits after the decimal point. The Kfactor is the pulses per unit of measure (eg. pulses/litre, pulses/gallon, etc). The Kfactor can be programmed in the range of ,999. See Section 3.4. CAL 03 Cutoff Frequency. This determines the cutoff frequency in the range of Hz. The default setting is 0.25HZ. Note that care must be taken when programming this value because a low value may cause a slow update time. CAL 04 Decimal Point for Rate Display. The flow rate can be displayed with 0, 1, 2 or 3 places after the decimal point. CAL 05 CAL 06 Timebase for Rate. The rate can be displayed in units per second, minute, hour or day. 0 = second 1 = minute 2 = hour 3 = day Filter. The filter constant for filtering the input signal. 1 No filtering. to 99 Very heavy filtering. CAL 07 Decimal Point for Total Display. The totals can be displayed with 0, 1, 2 or 3 places after the decimal point. CAL 08 CAL 09 CAL 10 CAL 11 Total Conversion Factor - whole numbers. Total Conversion Factor - digits after the decimal point. Low Alarm - whole numbers. Low Alarm - digits after the decimal point.

13 Sponsler, Inc. Model IT375 Programming Pg. 13 Step Comment CAL 10 & 11 program the flow rate below which the low alarm relay will close. The value can be programmed in the range 0 to 999,999. CAL 12 CAL 13 High Alarm or Pulse Output Factor - whole numbers. High Alarm or Pulse Output Factor - digits after the decimal point. CAL 12 & 13 program the flow rate above which the high alarm relay will close. The value can be programmed in the range 0 to 999,999. If the scaled pulse output is selected (CAL0 = 1), then the value will represent the total per pulse, eg. 5 liters per pulse. CAL 14 CAL 15 4mA Setpoint- whole numbers. 4mA Setpoint- digits after the decimal point. CAL 14 to CAL 15 represent the flow rate at which 4mA will be output. If the 4-20mA output is not installed, these parameters can be ignored. CAL 16 CAL 17 20mA Setpoint- whole numbers. 20mA Setpoint- digits after the decimal point. CAL 16 & 17 represent the flow rate at which 20mA will be output. If the 4-20mA output is not installed, these parameters can be ignored. CAL 18 Number of linearization points. 00 = linearizer disabled xx = number of points INP 01 Point #1 Frequency whole numbers. Input points must be programmed in ascending frequency order INP.01 OUT 01 Point #1 Frequency digits after the decicmal Point #1 Kfactor whole numbers. Kfactors can never be zero OUT.01 SOFT Point #1 Kfactor digits after the decimal. Software Version.

14 Sponsler, Inc. Model IT375 Programming Pg. 14 MING INITIATE REMOVE & REVERSE BOTTOM STRIP EXIT REPEAT ABOVE STEP TOTAL RATE = FLASHING DIGIT PULSE OUTPUT CAL 00 PRESS TO ADVANCE TO NEXT MENU ITEM 0 = NO OUTPUTS 1 = SCALED PULSE OUTPUT & LOW ALARM 2 = UNSCALED PULSE OUTPUT & LOW ALARM SOFT K-FACTOR WHOLE NUMBERS CAL 01 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS K-FACTOR DIGITS AFTER DECIMAL CAL 02 PRESS TO ADVANCE TO NEXT MENU ITEM CUTOFF FREQUENCY 000 CAL 03 PRESS TO ADVANCE TO NEXT MENU ITEM HZ HZ RATE DISPLAY 0 0 PLACES AFTER DECIMAL CAL 04 PRESS TO ADVANCE TO NEXT MENU ITEM RATE TIMEBASE CAL 05 0 = SECOND, 1 = MINUTE, 2 = HOUR, 3 = DAY PRESS TO ADVANCE TO NEXT MENU ITEM FILTER CAL 06 PRESS TO ADVANCE TO NEXT MENU ITEM TOTAL DISPLAY 0 PLACES AFTER DECIMAL CAL 07 PRESS TO ADVANCE TO NEXT MENU ITEM TOTAL CONVERSION FACTOR WHOLE NUMBERS CAL 08 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS TOTAL CONVERSION DIGITS AFTER DECIMAL CAL 09 PRESS TO ADVANCE TO NEXT MENU ITEM LOW ALARM WHOLE NUMBERS CAL 10 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS LOW ALARM DIGITS AFTER DECIMAL CAL 11 PRESS TO ADVANCE TO NEXT MENU ITEM CONTINUED ON NEXT PAGE

15 Sponsler, Inc. Model IT375 Programming Pg = FLASHING DIGIT CONTINUED FROM PREVIOUS PAGE HIGH ALARM OR PULSE OUTPUT FACTOR WHOLE NUMBERS CAL 12 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS HIGH ALARM OR PULSE OUTPUT FACTOR DIGITS AFTER DECIMAL CAL 13 PRESS TO ADVANCE TO NEXT MENU ITEM mA SETPOINT WHOLE NUMBERS CAL 14 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS 4mA SETPOINT DIGITS AFTER DECIMAL CAL 15 PRESS TO ADVANCE TO NEXT MENU ITEM mA SETPOINT WHOLE NUMBERS CAL 16 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS 20mA SETPOINT DIGITS AFTER DECIMAL CAL 17 PRESS TO ADVANCE TO NEXT MENU ITEM POINT #1 FREQUENCY WHOLE NUMBERS LINEARIZATION POINTS CAL 18 XX INP 01 PRESS TO ADVANCE TO NEXT MENU ITEM PRESS TO ADVANCE TO NEXT MENU ITEM 00 = LINEARIZED DISABLED XX = NUMBER OF POINTS COMBINATION CAN T EXCEED 6 DIGITS POINT #1 FREQUENCY DIGITS AFTER DECIMAL INPUT 01 PRESS TO ADVANCE TO NEXT MENU ITEM POINT #1 K-FACTOR WHOLE NUMBERS OUT 01 PRESS TO ADVANCE TO NEXT MENU ITEM COMBINATION CAN T EXCEED 6 DIGITS POINT #1 K-FACTOR DIGITS AFTER DECIMAL OUT 01 PRESS TO ADVANCE TO NEXT MENU ITEM SOFTWARE VERSION 202d3.2L SOFT CAL 00

16 Sponsler, Inc. Model IT375 Example Pg EXAMPLE A typical 2 inch liquid flowmeter has an operating range of gpm and produces pulses per gallon with a maximum output frequency of 563Hz. 3 points of linearization is required. The flow rate is displayed in gallons/min with 1 decimal point and the total in liters with no decimals. A 4-20mA output is installed and 4mA is to represent 15 gallons/min and 20mA is to represent 225 gallons/min The instrument is then programmed as follows: Calibration mode is entered by removing the lower cover strip (ie. the dark grey strip along the bottom of the enclosure) and reversing it s left right orientation. The following values are then entered: Step Value of Parameter Description CAL00 0 No Pulse Output CAL Kfactor (whole numbers) CAL Kfactor (decimals) CAL Cutoff Frequency CAL04 1 Rate decimal position CAL05 1 Timebase CAL06 01 Filter disabled CAL07 0 Total decimal position CAL Total Conversion (whole numbers) CAL Total Conversion (decimals) (1/3.785) CAL Low Alarm (whole numbers) CAL Low Alarm (decimals) CAL High Alarm (whole numbers) CAL High Alarm (decimals) CAL mA Output (whole numbers) CAL mA Output (decimals) CAL mA Output (whole numbers) CAL mA Output (decimals) CAL point linearization INP Point #01 frequency (whole numbers) INP Point #01 frequency (decimals) OUT Point #01 Kfactor (whole numbers) OUT Point #01 Kfactor (decimals) INP Point #02 frequency (whole numbers) INP Point #02 frequency (decimals) OUT Point #02 Kfactor (whole numbers) OUT Point #02 Kfactor (decimals) INP Point #03 frequency (whole numbers) INP Point #03 frequency (decimals) OUT Point #03 Kfactor (whole numbers) OUT Point #03 Kfactor (decimals) SOFT 202d3.2L Software Version

17 Sponsler, Inc. Model IT375 Versions Pg VERSIONS This table summarizes features of each of the different Model IT375 versions: Model Number IT375i.X0L IT375i.X3L IT375i.X4L Version Battery powered DC powered Loop powered Power Lithium batteries DC powered; 9-28Volts at 4mA maximum Loop powered; 9-28 Volts with 4-20mA out Output None Alarms - two open collector outputs OR Pulse output and low flow alarm Supply Backup None Lithium batteries Lithium batteries The standard unit is intrinsically safe (i), turbine mounted (4), battery powered (0) and linearized (L) IT375i.40L X denotes the mounting options, insert the corresponding number for the preferred option: SR Strain relief cable entry PM Panel mount WM Wall mount (standard) 4 Turbine adaptor EX Explosion proof 6.1 BATTERY POWERED VERSION The battery powered version of the Model IT375 is designed for operation in the field without external power sources. Lithium batteries provide sufficient power to operate the instrument for up to 5 years and the operator is warned of a low power condition by a message on the LCD display. New batteries can be purchased via Sponsler Company, Inc. or our distributors and replaced in the field without compromising the IS approvals. There are two battery packs in each instrument and care must be taken to replace only one pack at a time so that there is always power connected to the memory. Failure to do this may result in loss of totals.

18 Sponsler, Inc. Model IT375 Versions Pg DC POWER VERSION The DC power version will operate from an external power source between 9-28VDC and draws no more than 4mA. This enables the instrument to be powered from AC mains with DC adaptors and eliminates the need to run separate DC voltages in the field. The instrument uses lithium batteries for backup if the DC power is interrupted. However, alarms and/or pulse outputs are disabled if the DC power is interrupted. Open collector outputs are also provided for high and low flow rate alarms. If a pulse output is programmed, terminals 5(-) and 6(+) will act as a pulse out. The output can sink up to 200mA and can be used to control external relays, lights or audible alarms. The outputs are internally protected against inductive voltage spikes caused by relay coils etc. Both outputs are independent and optically isolated. The alarm setpoints can be programmed. The low flow alarm will switch on whenever the flow rate drops below the programmed low flow rate setpoint. Similarly, the high alarm switches on whenever the flow exceeds the high flow rate setpoint. If a scaled pulse output is programmed, a pulse will be output every preset value of the total. For example, if the total is in liters, then programming 5 will output one pulse every 5 liters. If an unscaled pulse output is programmed, output pulses will occur at the flowmeter input frequency. Specification for Alarm Outputs Maximum Current): Maximum Voltage: Saturation Voltage: Isolation: Pulse Frequency: Pulse Duration: 200mA. (sink) 30Vdc. 0.8Vdc across outputs when in the "on" state. Both outputs are separately isolated. 500Hz maximum. 1ms if CAL0 = 2 (unscaled pulse output). If CAL0 = 1 (scaled pulse output) the duration of the pulse automatically adjusts to the output frequency: a. 1ms if output > 50Hz. b. 10ms if output = Hz. c. 100ms if output < 5Hz. ma Meter A + Opto- Isolated Outputs Power/4-20mA Loop RL 4-20mA Low Alarm High Alarm For Pulse 9-28 VDC << Low Alarm << << High Alarm <<

19 Sponsler, Inc. Model IT375 Versions Pg RELAY AND 4-20mA OUTPUT VERSION This version combines features of the DC powered with a 4-20mA output. The 4-20mA output provides a two-wire retransmission of the flow rate. Both the 4mA and 20mA setpoints are fully programmable so that the output can span either the entire operating range or only a portion. The instrument draws its operating power from the 4-20mA loop and uses the internal lithium batteries for backup if the 4-20mA loop is interrupted. The alarm/pulse outputs are disabled if the 4-20mA loop is interrupted. Specifications: Resolution and Linearity: 0.05% of span. Accuracy: 0.05% of span at 25 C. 0.1% (typ) of span, full temperature range. Response (4-20mA): 0.5 second. Loop Power Supply: 9-28 Volts. Since the 4-20mA output is designed to provide power to the Model IT375, it is not isolated from the input. Hence, all sensors must be self-powering (such as reed switches and coils). If external power is required to power the sensor (eg. Namur switches, Hall effect sensors or opto-sensors), the power supply delivering the external power must be isolated from the 4-20mA loop supply. Typical Connection Connection to a Sensor requiring External Power

20 Sponsler, Inc. Model IT375 Flowmeter Input Pg FLOWMETER INPUT The Model IT375 has an input conditioning circuit which will accept signals from most sinewave or pulse producing flowmeters. Links on the rear panel enable the input circuit to be configured for different signal types. The input will interface directly to: Turbine flowmeters. Open collector outputs. Reed switches. Logic signals. Two-wire proximity switches. The following pages give examples of interfacing to various signal inputs. A circuit diagram of the input is also provided. For pulse or logic type signals, the input switching threshold is 1.3 volts. That is, the input signal must have a "low" voltage of less than 1.2 volts and a "high" voltage of greater than 1.4 volts. For flowmeters with reluctance type coils, the minimum input voltage is 15mVp-p All inputs are protected for overvoltage up to 28 volts.

21 Sponsler, Inc. Model IT375 Flowmeter Input Pg Squarewave, CMOS or Pulse Link Settings Link 1 COIL PULSE Link 2 DB DBH Link 3 NPS Switching threshold voltage is 1.3 volts. 2. Open Collector With 15µA/150µA internal pull up current Link Settings Link 1 COIL PULSE Link 2 Link 3 DBL NPS DBH 3. Reed Switch - Battery Powered With 15µA internal pull up current Link Settings Link 1 COIL PULSE Link 2 Link 3 DBL NPS DBH eg. Positive displacement flowmeters with reed switch outputs. Note: For a switch or reed input with contact bounce link DBL can be switched "on". This will eliminate the effect of switch bounce while limiting the input frequency to 200Hz. 4. Reed Switch - External DC Power With 150µA internal pull up current Link Settings Link 1 COIL PULSE Link 2 Link 3 DBL NPS DBH Note: For a switch or reed input with contact bounce link DBH can be switched "on". This will eliminate the effect of switch bounce while limiting the input frequency to 200Hz.

22 Sponsler, Inc. Model IT375 Flowmeter Input Pg Coils Link Settings Link 1 COIL PULSE Link 2 DB DBH Link 3 NPS 825R input impedance eg. Millivolt signal from paddlewheel or turbine (15mV P-P minimum). Note: If the input has a very high impedance, the following link settings should be used: Link Settings Link 1 COIL PULSE Link 2 Link 3 DBL NPS DBH 6. Namur Proximity Switch Link Settings Link 1 COIL PULSE Link 2 Link 3 DBL NPS DBH 825R input impedance For IS connections of Namur switches see Section 8. Note: If a 4-20mA output is installed, the supply to the proximity switch must be isolated. 7. Namur Proximity Swith External DC Power +12 Volts Link Settings Link 1 COIL PULSE 8+ Link 2 DBL DBH 0 V 7- Link 3 NPS 825R input impedance For IS connections of Namur switches see Section 8. Note: Use this connection for battery or loop powered versions of the Model IT375. If a 4-20mA output is installed, the supply to the proximity switch must be isolated.

23 Sponsler, Inc. Model IT375 Intrinsic Safety Pg INTRINSIC SAFETY CONNECTIONS When installing the Model IT375 in hazardous areas, the wiring and installation must comply with appropriate installation standards. The approval uses entity parameters on the input for connections to the flowmeter and associated apparatus type approval for the 4-20mA output. The 4-20mA output must, therefore, only be connected to barriers with the specified safety parameters as shown on the following page. 8.1 COILS The Model IT375 will connect directly to a turbine flowmeter or paddlewheel with a certified Intrinsically Safe (IS) coil or other certified IS sensor which produce a pulse input provided they do not exceed the following input parameters: Ui = 24V Ii = 20mA Pi = 320mW The maximum allowed capacitance and inductance of the pulse or coil including the cabling is: Cext = 60µF Lext = 1.5H The internal capacitance and inductance of the Model IT375 seen on the input are negligibly small with Ci = 0.002uF and Li = 0mH. The maximum voltage and current produced by the Model IT375 on its inputs (terminals 1 to 4) are: Uo = 10.0V (open circuit) Io = 9.0mA (short circuit) 8.2 SIMPLE APPARATUS Devices such as reed switches which can be classed as "simple apparatus", as defined in the CENELEC standards EN50020, can be connected to the Model IT375 without certification. 8.3 NAMUR PROXIMITY SWITCHES Connection to certified Namur proximity switches is permitted as shown on the following page with the following maximum input parameters: Ui = 24V Ii = 20mA Pi = 320mW

24 Sponsler, Inc. Model IT375 Intrinsic Safety Pg. 24 SAFE AREA HAZARDOUS AREA IS Barrier Ro = 300 ohm + - Cable length < 5 km MODEL IT375 Rate Totalizer IS BARRIER Uo = 28 V maximum Io = 93 ma maximum Po = W maximum L/R < specified for selected barrier EXAMPLES BARRIERS MTL , 787SP, 3041, 3042, 2441, 2442, 4041, 4045 ENTITY PARAMETERS FOR INPUT TERMINALS 7 & 8 Ui = 24 V Ii = 20 ma Pi = 320 mw Ci = uf Li = 0.0 Uo = 10.0 V Io = 9.0 ma Cext = 60 uf Lext = 1.5 H Pepperl & Fuchs Z248/Ex, Z488/Ex, Z488/Ex-R, KHD3-ICR/EX , ZG31/EX Input Parameters And 4-20mA Retransmission SAFE AREA HAZARDOUS AREA + - I Namur Proximity Detector IS Certified IS CERTIFIED BARRIER Uo = 24 V maximum Io = 20 ma maximum Po = 320 mw maximum L/R < specified for selected barrier 8+ INPUT 7- MODEL IT375 Link Settings COIL PULSE Link 1 Link 2 DBL DBH Link 3 NPS A Namur Switch Input

25 Sponsler, Inc. Model IT375 Intrinsic Safety Pg ALARM OUTPUTS The low alarm and high alarm/pulse output can be connected to suitably certified devices provided the circuit is protected with a barrier with the maximum safety parameters: Uo = 28V Io = 93mA Pmax = 0.653W The input capacitance on these terminals is 0.1uF max and the inductance is negligible. Note: The two alarm outputs must be kept as independent IS circuits and each protected with their own barrier. It is not permissible to connect these circuits via a common barrier. SAFE AREA HAZARDOUS AREA IS CERTIFIED BARRIER Uo = 28 V maximum Io = 93 ma maximum Po = 653 mw maximum IS Certified Device Such as an Alarm Lamp Or IS Solenoid 4 or 6 MODEL IT375 3 or 5

26 Sponsler, Inc. Model IT375 Installation Pg INSTALLATION 9.1 WALL MOUNTING A wall mounting bracket is supplied with each instrument. Round head screws should be used to attach the bracket to the wall (countersunk screws should not be used). The bracket is mounted first with the tray section at the bottom. The instrument is then mounted on the bracket with two screws as shown below. 9.2 PANEL MOUNT VERSION The panel mount version of the Model IT375 is supplied with two panel mount brackets and plug-in terminals which are accessible from the rear of the instrument. A diagram of the rear panel is shown below: MODEL IT375 SIGNAL INPUT HIGH ALARM RELAY 2 (PULSE) (INPUT) LOW ALARM RELAY! 9-28v POWER/4-20!mA OUTPUT LOOP Rear View of IT375 Panel Mount Case The cutout for the panel mount version is 141mm (5.55") wide x 87mm (3.43") high.

27 Sponsler, Inc. Model IT375 Installation Pg REMOVING THE FRONT PANEL The front panel should be removed as follows: 1. Remove the top and bottom cover strips (ie. the dark plastic strip) by levering a screwdriver under one end. 2. Undo the screws retaining the front. Do not remove the screws, they are retained by O-rings. 3. Remove the front panel from the housing. To replace the front cover, reverse the above procedure. Ensure that the front panel is aligned at connector points before tightening the screws. 9.4 THE MAIN ELECTRONICS The front section of the housing contains the microprocessor and display. It is possible to adjust the display contrast via a small potentiometer on the board. The Display Contrast is shown below and this can be adjusted for optimum contrast and clarity. Adjacent to this control is a RESET switch which can be used to reset the microprocessor. Note: Depressing the RESET switch will reset all totals to zero.

28 Sponsler, Inc. Model IT375 Installation Pg WIRING When connecting the IT375 it is good practice to use shielded cable. The shield should be connected to earth at one end of the cable. The other end of the shield should not be connected. This wiring practice is mandatory in order to comply with the requirements for Electromagnetic Compatibility as per EMC-Directive 89/336/EEC of the Council of the European Community. 9.6 TERMINAL DESIGNATIONS All versions 8 Pulse (+) / Coil Input 7 Pulse (-) / Coil Input 4-20mA and DC Versions 6 High Alarm (+) or Pulse Output (+) 5 High Alarm (-) or Pulse Output (-) 4 Low Alarm (+) 3 Low Alarm (-) 4-20mA Output Version mA (+) mA (-) DC Power Version 2 DC Power (+) +9 to 28V 1 DC Power (-) 0V Dimensional Drawing 152mm (6.0") 16mm (0.6") 98mm (3.9") 87mm (3.5" Terminal Descriptions 141mm (5.6") REAR VIEW 43mm (1.7") SIDE VIEW No. 7 8 All Versions Signal Input (-) Signal Input (+) 4-20mA or DC Versions No mA (-) or OVdc In mA (+) or +9-28Vdc In 3 4 Low Alarm (-) Low Alarm (+) 5 6 High Alarm (-) or Pulse (-) High Alarm (+) or Pulse (+)

29 Sponsler, Inc. Model IT375 Installation Pg. 29 Index 4-20mA Output, 19 A Accumulated Total, 9 B Battery Powered, 17 C CAL Sequences, 12 Cutoff Frequency, 11 D DC Power, 18 Decimal Point, 12 Display, 7 Display Test, 7 F Filtering, 8 Flow Chart, 14,15 Flow Rate, 9 Frequency Cutoff, 10 Operating Temperature, 6 Operation, 7 P Panel Mount, 6,26 Programming, 11 Protection, 6 Pulse Output, 12 R Rate, 9 Removing the Front Panel, 27 Resettable Total, 7 S Specification, 6 T Temperature, 6 Terminal Designations, 26, 28 Test Mode, 7 Timebase, 12 Total Conversion, 9 W Wall Mounting, 26 H High Alarm, 13 High Test, 7 I Input Signal, 18 Installation, 26 Intrinsic Safety, 5, 23 K Kfactor, 9,12 L Link Settings, 19 Low Alarm, 12 Low Test, 7 M Model Number, 4 O

30 Sponsler Company, Inc. Model IT375 Index Pg. 30

31 Sponsler Company, Inc. Model IT375 Index Pg. 31

32 2009 Pub. No. MN-IT375 (9/2009)